I am not holding my breath on any kind of big follow up move. And as to Beal, if they were going to get him, I don't think they would have signed Conley. Conley is a better fit for the need anyway. BOS needs the ballhandler/floor general type, Beal isn't that. Conley will probably hardly play, Beal would play even less.
I am sure that BOS will keep looking and listening, but I don't see any kind of big move as likely. Stevens has been a very good GM for many seasons. I accept that he is probably smarter than me and with a lot more information at hand. I am with Neurotic Guy, this is not the end of the world. I don't think the trade made the team better, at least at this point, but the team is probably in a better place now than 1 year ago.